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  1. Maz

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    All of them are showing the movement of pollen.It cannot be B since the pollen does not enter the style directly without passing through the stigma first. You have to remember that the pod was earlier the female organs of the plant.
  2. Maz

    Physics, Chemistry and Biology: Post your doubts here!

    Firstly, from where in the world did you get such old papers? (please post the link.) And why are you solving them in the first place. Don't tell me you have completed all the latest ones.
  3. Maz

    Physics, Chemistry and Biology: Post your doubts here!

    Composition does not refer to the composition of the compound unless stated eg. the composition of iron oxide is iron and oxygen. In this q. composition merely means what it is made of.
  4. Maz

    Physics, Chemistry and Biology: Post your doubts here!

    Okay, then assalaamu alaikum for now. I really need my sleep. Pray for an A* everyone.(y) Insha Allah.
  5. Maz

    Physics, Chemistry and Biology: Post your doubts here!

    You now the question itself says what is bond energy. "Bond energy is the amount of energy, in kJ, which must be supplied to break one mole of the bond." This is present in the question itself. '_'
  6. Maz

    Physics, Chemistry and Biology: Post your doubts here!

    The molecular formula is C4H4O4. And the question says that one mole is dibasic. THerefore, HOOC-C=C-COOH | | H H There should be in total 4 of each.But, since it is dibasic we make 2 molecules.
  7. Maz

    Physics, Chemistry and Biology: Post your doubts here!

    Sodium and potassium decompose when heated to their nitrites and oxygen. lesser reactive metals decompose to form their oxides, nitrogen dioxide and oxygen.
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